Nut-lock.



R. E. NORRIS.

NUT LOCK.

APPLICATION FILED SEPT. 24, 1913.

1,129,@96n Patented M21122, 1915.

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ROBERT E. NORRIS, 0F FAYETTEVILLE, ARKANSAS, ASSIGNOR 0F ONE-HALF T0 MORE-IS N. BENSON, 0F PAIR-IS, TEXAS.

NUT-LOCK.

Specification of Letters Patent.

Patentedlwar. a, 1915.

To all whom it may concern:

Be it known that I, ROBERT E. NORRIS, a citizen of the United States, residing at Fayetteville, in the county of Washington, State of Arkansas, have invented certain new and useful Improvements in Nut- Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains tomake and use the same.

The present invention is directed to improvements in nut locks, and has for its object to so construct a device of this charac ter that when in place upon the bolt independent rotation of the nut and bolt is prevented.

A further object of the invention is to provide a nut lock which is exceedingly simple in construction, eflicient inoperation and one which can be manufactured at a very small cost.

With these and other objects in view, this invention resides in the novel features of construction, formation, combination and arrangement of parts to be hereinafter more fully described, claimed and illustrated in the accompanying drawing, in which Figure 1 is a bottom plan view of the nut, the bolt being shown in section. Fig. 2 is a sectional view on line 2-2 of Fig. 1. Fig. 3 is a similar view to Fig. .1, showing the pawl in a position assumed when the nut is being rotated for application. Fig. 4: is a detail perspective view of the pawl.

Referring to the drawing, the numeral 1 designates a nut having the usual bolt 0pening 2, said nut having its inner face provided with a V-shaped socket 3 in which is mounted the pawl 4. The pawl 4 is substantially triangular in formation and is adapted to have its minor end engage the minor end of the socket 3, so that said pawl will be permitted to oscillate, it being of course understood that the pawl is of less dimension than the socket 3. The major end of the pawl is provided with a transverse groove 5 which produces a knife edge 6 and a beveled edge 7, which is overhung by the edge 6.

It will be of course understood that the socket 3 is of such size that when the nut is rotated in one direction the threads of the bolt will engage the beveled edge 7, thus swinging the pawl to a position which holds the cutting edge 6 out of contact with the bolt threads, but when the tendency of the bolt is 'to rotate in a direction to disengage the bolt the pawl will swing to a position so that the cutting edge bites into the threads, thus preventing independent rotation of the nut and bolt.

What is claimed is In a nut lock, the combination with a bolt, of a nut engageable thereon, said nut having a V-shaped socket formed in its inner face and having its major end opening into the bolt opening of the nut, a wedge shaped pawl having its minor end engaged with the minor end of the socket, said pawl having its major end provided with a transverse groove, whereby a cutting edge and beveled edge are produced, the formeroverhanging the latter so that when the nut is rotated in one direction the beveled edge will contact with the threads of the bolt, and when rotated in a reverse direction the beveled edge disengages the bolt threads to permit the cutting edge to engage the threads, as and for the purpose set forth.

In testimony whereof, I affix my signature, in 'thepresence of two witnesses.

R. NORRIS.

Witnesses:

KINNEY ARMSTRONG, F. T. Corner.

flopiea of this patent may be obtained for five cents each, by addressing the Gommissioner or Iatenta, Washington, 1'). I12. 

